Yoshimura Suzuki’s James Stewart has been “provisionally suspended” by the Fédération Internationale de Motocyclisme (FIM) after failing a drug test issued by the World Anti-Doping Agency (WADA).

The test was administered at round 15 of the Monster Energy Supercross Championship in Seattle, Wash. on April 12. The FIM states that Stewart’s urine sample had an “adverse analytical finding of amphetamine.”

Ryan Villopoto dominated in Seattle to claim his fifth win of the season. (Photo: Getty Images)

Monster Energy Supercross’ anticipated return to New York for the first time in 23 years has the makings of a historic evening with Ryan Villopoto on the verge of securing a fourth consecutive title. Villopoto has been the rider to beat throughout the 2014 season and thanks to back-to-back wins, he needs just an 18th-place finish to continue his dominance of the sport. As a result, Villopoto tops the Power Rankings as he looks to do the same thing his hometown Seattle Seahawks did at the Super Bowl in February, win a world championship inside MetLife Stadium.

Each week, The Power Rankings will recognize the movers and shakers in Monster Energy Supercross.